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[PKT_SCHED]: vlan tag match

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Provide a way to use tc filters on vlan tag even if tag is buried in
skb due to hardware acceleration.

Signed-off-by: Stephen Hemminger <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Stephen Hemminger 2008-02-05 03:20:13 -08:00 • committed by David S. Miller
commit 3113e88c3c
3 changed files with 20 additions and 1 deletions
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17
net/sched/em_meta.c
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@ -65,6 +65,7 @@
#include <linux/string.h>
#include <linux/skbuff.h>
#include <linux/random.h>
#include <linux/if_vlan.h>
#include <linux/tc_ematch/tc_em_meta.h>
#include <net/dst.h>
#include <net/route.h>
@ -169,6 +170,21 @@ META_COLLECTOR(var_dev)
*err = var_dev(skb->dev, dst);
}
/**************************************************************************
* vlan tag
**************************************************************************/
META_COLLECTOR(int_vlan_tag)
{
unsigned short tag;
if (vlan_get_tag(skb, &tag) < 0)
*err = -1;
else
dst->value = tag;
}
/**************************************************************************
* skb attributes
**************************************************************************/
@ -520,6 +536,7 @@ static struct meta_ops __meta_ops[TCF_META_TYPE_MAX+1][TCF_META_ID_MAX+1] = {
[META_ID(SK_SNDTIMEO)] = META_FUNC(int_sk_sndtimeo),
[META_ID(SK_SENDMSG_OFF)] = META_FUNC(int_sk_sendmsg_off),
[META_ID(SK_WRITE_PENDING)] = META_FUNC(int_sk_write_pend),
[META_ID(VLAN_TAG)] = META_FUNC(int_vlan_tag),
}
};